What all are you needing? Most of the larger plastics are not being reproduced, but many smaller pieces are. Most of the seat upholstery on the cobras and GT's are being reproduced and even some of the more obscure fabrics can still be purchased (nos). You can check TMI Upholstery for seat fabric and foam. Dashes Direct for dash pads. The door panels may be hard to find. I'm not sure they're being produced, but you can probably repair what you have. I dont recall if the interior door handles were still down low like the 79's. I think those are the ones not being repopped.
The 80 and 81 cobras are nice....lower numbers than 79 cobra and the body treatments were nice like the pace cars (front air dam, 3 piece spoiler, rear-facing cowl-style hood scoop, and some really nice graphics. Also, I'm pretty sure the Recaros made their way into many of them....or were they standard like the pace cars? I can't remember. The recaro seat covers are being reproduced, but they're spendy. To make matters worse, the manufacturer suggests new seat foam and installation is better left to the pros. If you don't have Recaro seats, recovering them is much cheaper and more of a diy job, if you don't mind the work.